What is the principle behind invoking Dubbo interfaces?

Dubbo is an open-source, high-performance, lightweight distributed service framework used for constructing large distributed systems. Its interface invocation principle mainly consists of the following steps:

1. Service provider registration: Service providers register the services they provide with the registration center, which records the address and other information of the service provider.
2. Consumers subscribe to services: Consumers subscribe to the services they need from the registration center, which returns the corresponding service provider address.
3. Load balancing: If there are multiple service providers, the load balancing component will choose one service provider based on a certain strategy.
4. Communication: Consumers send requests to selected service providers through the network, usually using RPC for remote calls.
5. Serialization: Data serialization and deserialization need to be performed between service consumers and service providers to convert objects into byte streams for network transmission.
6. Remote Invocation: The service provider receives a request, processes it based on the data in the request, and returns the result to the service consumer.
7. The outcome transmission: The service provider will transfer the processing results to the service consumer via the network.
8. Deserialization: After receiving the result, the service consumer deserializes the byte stream into the corresponding object.
9. Interface calls: Service consumers return the results to the caller, who then receives the corresponding results.

By following the above steps, Dubbo has achieved remote service invocation and transmission, enabling communication and collaboration among various services in a distributed system.